Patent US441838A successfully refreshed from Google Patents.
US441838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ments
Assignee: —
•
Filing: —
•
Granted: 1890-12-02
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Expires: 1907-12-02
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:33
CPC Classifications
F; F16; F16L; F16L3/00; F16L3/08; F16L3/12; F16L3/123; F16L3/1233
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1893-12-01 | 1894-06-02 | 1894-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1897-12-01 | 1898-06-02 | 1898-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1901-12-02 | 1902-06-03 | 1902-12-03 | $7700.00 | Window Closed / Lapsed |